Horizon Alert
Summary of the vulnerability and why it matters
A critical vulnerability has been identified in phpMyFAQ, a web-based FAQ system, that allows for authentication bypass. This issue affects how user credentials are handled during passkey registration, potentially enabling unauthorized access to accounts. The main concern is to confirm if this system is in use and assess the exposure.
- Bypasses account security using passkeys.
- Impacts systems handling public user information.
- Confirm relevance and potential exposure.
Attack Path
How an attacker could exploit the issue
An attacker can bypass authentication in phpMyFAQ by exploiting a flaw in the WebAuthn registration process. This vulnerability allows an attacker to register a new passkey linked to any user account without needing the user's password or any prior authentication. Once a passkey is registered, the attacker can use it to log in as the targeted user, effectively taking over their account and bypassing multi-factor authentication.
- No authentication required to register credentials.
- Forged attestation registers a passkey.
- Leads to full account takeover.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an unauthenticated attacker to bypass authentication mechanisms and take over user accounts. This could occur when the WebAuthn registration endpoints are accessed, allowing an attacker to register a passkey to any account without proper validation.
- User accounts and access controls.
- Unauthenticated registration of passkeys.
- Unauthorized account access and control.
Operational Fix
Recommended remediation, mitigation, and detection steps
The application owner is responsible for addressing this vulnerability in phpMyFAQ, as it directly impacts user authentication. The first practical step is to identify all instances of phpMyFAQ, confirm their exposure to the internet, and determine their criticality. Once accountable owners are identified, remediation can be planned based on the assessed risk.
- Application owners must address this.
- Verify internet exposure and criticality.
- Plan risk-based remediation.
